Tomasz Wróblewski (born 2 June 1980), stage name Orion, is a Polish musician, best known as the bassist for the extreme metal band Behemoth.

Since 1997, he also is a member of symphonic black metal band Vesania as a lead vocalist and guitarist.

In 2002, he became bassist of doom metal band Neolithic and was a member of the group till 2006 when they were disbanded.

In 2004, Behemoth was joined by session guitarist Patryk "Seth" Sztyber, while Orion took bass again, and became an official member.

The group eventually split up after releasing two albums, due to vocalist Maciej Taff's retirement from the music industry because of health condition.